单项选择题
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
A.automatically suppressed
B.finished by the operator
C.manually suppressed
D.done again
点击查看答案&解析
相关考题
-
单项选择题
DSC distress acknowledgements are normally transmitted by（）in respond to a receiver DSC distress call.
A.Ship stations
B.Coast stations
C.NCSs
D.NCC -
单项选择题
Distress and safety communications following DSC calling will be performed by radiotelephony or（）.
A.NBDP
B.EGC receiver
C.NBDP or both
D.EGC receiver or both -
单项选择题
If a ship station relays a DSC distress call to an appropriate coast station, it means that（）.
A.the ship has received the DSC distress call on a HF frequency
B.the coast station concerned has not acknowledged it within 5 minutes
C.the ship will take command of search and rescue in 5 minutes
D.A and B
